Lift Soybean Yield 12.3 sc/ha and Cut Phosphate 10%

The Problem

Soybean economics keep getting tighter. Fertilizer and crop protection cost more every season, and at modern application rates, adding another unit of fertilizer no longer reliably buys an extra unit of yield. Margins are shaped less by gross volume than by how efficiently each input gets converted into grain.

The question for most operators isn't spend more, it's get more out of what you already spend.

The Trial

A 2024/2025 commercial-season trial at Lafe Pesquisa in Três Corações, Minas Gerais compared seven program variants on BMX Zeus IPRO soybeans, including different combinations of Agrarius applications and input-reduction levels. The benchmark was the consulting firm's standard management.

• Location: Lafe Pesquisa Research Station, Três Corações, MG
• Variety: BMX Zeus IPRO
• Season: 2024/2025 commercial harvest
• Programs tested: 7 (control + Agrarius variants × input-reduction levels)
• Best protocol: four Agrarius applications at V3, R1, R3, R5 (0.5 L/ha each) + 10% phosphate reduction

What Happened

The optimized Agrarius program — full nutritional base + four applications + a moderate 10% phosphate cut — delivered the highest yield and best economics.

• Yield: 89.9 sc/ha vs. 77.6 sc/ha control — +12.3 sc/ha (+15.8%).
• Phosphate spend: −10% with no yield penalty.
• Net profit: +R$627/ha (additional yield value R$706 + fertilizer savings R$70 − Agrarius cost R$149).
• ROI: 5.21× on the Agrarius spend.
• Yield components: more pods and grains per plant — 1000-grain weight and plant height were unchanged. Gains came from better reproductive efficiency, not bigger seeds or taller plants.

Aggressive 25% input cuts and single-application programs both underperformed. The pattern was clear: layering Agrarius onto a sound program beat trying to use it as a substitute for inputs.

Why This Matters

5.21× ROI is exceptional relative to most input investments soybean growers make.

• On a 500-ha soybean farm at 12.3 sc/ha gain × R$57/sc = R$350,550 of additional revenue.
• Plus R$34,805 in fertilizer savings.
• Less R$74,500 in Agrarius cost.
• Net profit improvement: R$310,855 per season — recurring as long as the program holds.

The bigger story is sustainability of the gain: yield is coming from physiological efficiency rather than higher input rates. That's the side of the cost curve operators want to be on.

How To Use It

The four-application program slots into a standard soybean spray calendar.

• V3 (~20–25 DAE): when the third trifoliate fully expands.
• R1 (~40–50 DAE): at first open flowers.
• R3 (~60–70 DAE): at pod set.
• R5 (~90–100 DAE): at seed growth.
• Rate: 0.5 L/ha per application; 2.0 L/ha season total.
• Tank-mix: compatible with fungicides, insecticides, and micronutrient programs already on the calendar.
• Fertilizer: moderate 10% phosphate reduction is sustainable; aggressive 25% cuts erased the yield response in this trial.